a = ['飞机1',"飞机1-1","飞机1-2"]
b = ['飞机2','飞机2-2b','飞机2-1']
crash = {'key1':a,"key2":b}
print('print key')
for key in crash.keys():
      print (key)
print("print value")
for value in crash.values():
      print(value)
print('print items')
for item in crash.items():
      print(item)
print('key to value')
#同 for i in crash.keys():
#keys()可以省略
for i in crash:
      print(i,crash[i])